CORROSION RESISTANT STEEL AND PRODUCTS MADE FROM IT Russian patent published in 2021 - IPC C22C38/24 C22C38/46 

FIELD: ferrous metallurgy.

SUBSTANCE: invention relates to the field of ferrous metallurgy, namely to the compositions of corrosion-resistant steel used for welded structures, assemblies and parts operating at temperatures from -20°C to 1100°C, in particular for pipes of heat exchange equipment operating in corrosive environments, equipment, parts, thermocouple covers, spark plug electrodes, heat exchangers. Steel contains carbon, silicon, manganese, chromium, tungsten, molybdenum, sulfur, phosphorus, nickel, copper, nitrogen, vanadium and iron with the following ratio of components, wt.%: carbon no more than 0.15, silicon no more than 1.0, manganese no more than 0.8, chromium 24.0-27.0, tungsten no more than 0.2, vanadium from more than 0.5 to 1.1, molybdenum no more than 0.3, sulfur no more than 0.025, phosphorus no more than 0.035 , nickel not more than 1.0, copper not more than 0.3, nitrogen 0.04-0.1, iron - the rest.

EFFECT: increased structural stability and operational reliability.

4 cl, 2 tbl, 1 ex